/*
    This file is part of the substandard lisp implementation of Standard Lisp
    Copyright (C) 2011 Nicky Nickell

    substandard lisp is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

(de member (a b)
  (cond
    ((null b) NIL)
    ((equal a (car b)) b)
    (T (member a (cdr b)))))

/*---
name: member

doc: |
  explaining what member is / how it is used!

tests: |
  (setq l '(a b (1 . 2) "foo" 1 2 c d)) -> (a b (1 . 2) "foo" 1 2 c d)
  (member 'a l) -> (a b (1 . 2) "foo" 1 2 c d)
  (member '(1 . 2) l) -> ((1 . 2) "foo" 1 2 c d)
  (member "foo" l) -> ("foo" 1 2 c d)
  (member 1 l) -> (1 2 c d)
  (member 'c l) -> (c d)
  (member 9 l) -> NIL
...*/
